SysrootServer: set SO_REUSEADDR flag on the socket

Should ensure that tests can still be run even if the previous one
hasn't properly relased the port yet.

Signed-off-by: Guillaume Desmottes <guillaume.desmottes@collabora.co.uk>
Reviewed-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Differential Revision: https://phabricator.apertis.org/D5220

tests/test_util.py

@@ -10,6 +10,7 @@
 
 import http.server
 import os
+import socket
 import subprocess
 import threading
 
@@ -134,6 +135,10 @@ class SysrootServer(http.server.HTTPServer):
         os.chdir(os.path.join(os.path.dirname(os.path.realpath(__file__)), 'files'))
         super().__init__(("", 1234), SysrootHTTPRequestHandler)
 
+    def server_bind(self):
+        self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+        self.socket.bind(self.server_address)
+
     def start(self):
         self.thread = threading.Thread(target=self.serve_forever)
         self.thread.daemon = True